10 questions from the JAMB 2016 Physics paper, with answers and explanations. Tap "Show answer" under each one when you are ready.
JAMB 2016Question 1 · Electricity and Magnetism
A charged particle is moving in a uniform magnetic field. if the direction of motion of the charged particle is parallel to the magnetic field, the path of the charge will
A.Be a straight line
B.Curve inwards
C.Be a parabola
D.Curve outwards
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Answer: A. Be a straight line
Motion parallel to a magnetic field experiences no magnetic force, so the path stays a straight line.
JAMB 2016Question 2 · Electronics and Alternating Current
Which of the following instruments can be used to measure current in an a.c circuit?
A.Hot wire ammeter
B.Moving coil ammeter
C.Tangent galvanometer
D.Moving coil galvanometer
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Answer: A. Hot wire ammeter
A hot-wire ammeter (heating effect) measures a.c. current regardless of frequency.
JAMB 2016Question 3 · Heat and Thermodynamics
When an athlete perspires after running, he loses heat through
A.Evaporation
B.Conduction
C.Radiation
D.Convection
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Answer: A. Evaporation
Sweat evaporating from the skin removes heat from the body.
JAMB 2016Question 4 · Heat and Thermodynamics
What will happen to the pressure of a gas if its temperature is reduced to −273∘C?
A.It will decrease
B.it will drop to zero
C.It will increase
D.It will remain constant
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Answer: B. it will drop to zero
At absolute zero (−273C), the pressure of an ideal gas theoretically drops to zero.
JAMB 2016Question 5 · Mechanics, Motion, and Energy
I.Chemical II.Sound III.Electricity Which of the above forms of energy can directly be converted to light energy?
A.I and II only
B.II and III only
C.I, II and III
D.I and III only
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Answer: D. I and III only
Chemical energy (combustion) and electrical energy (bulbs) directly convert to light; sound does not.
JAMB 2016Question 6 · Mechanics, Motion, and Energy
A train with an initial velocity of 20ms−1 is subjected to a uniform deceleration of 2ms−2 . The time required to bring the train to a complete halt is
A.40s
B.10s
C.20s
D.5s
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Answer: B.10s
t=u/a=220=10s.
JAMB 2016Question 7 · Nuclear and Modern Physics
Which of the following statements is Not true about atoms?
A.Atom of different elements have different atomic weights
B.The mass of an atom is concentrated in the nucleus
C.An atom is made up of a nucleus and number of electrons
D.Atoms of all elements are identical
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Answer: D. Atoms of all elements are identical
Atoms of different elements are not identical; they differ in structure and mass.
JAMB 2016Question 8 · Waves, Sound, and Optics
Myopic defects in the human eye can be corrected through the use of a
A.Concave Mirror
B.Concave lens
C.Prism
D.Convex lens
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Answer: B. Concave lens
Myopia (short-sightedness) is corrected with a concave (diverging) lens.
JAMB 2016Question 9 · Waves, Sound, and Optics
A boy in a barber's shop sits between two parallel mirrors. The number of images observed by him will be
A.Infinite
B.Ten
C.Eight
D.Forty
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Answer: A. Infinite
Two facing parallel mirrors produce theoretically infinite images.
JAMB 2016Question 10 · Waves, Sound, and Optics
Shadows and eclipse result from the
A.Reflection of light
B.Rectilinear propagation of light
C.Diffraction of light
D.Refraction of light
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Answer: B. Rectilinear propagation of light
Shadows and eclipses result from light travelling in straight lines (rectilinear propagation).
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